Fatto generale: 99858 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 99858 is an unremarkable number.
Trivia: 99858 is an unremarkable number.
Data storica: May 26th is the day in 1647 that Alse Young, hanged in Hartford, Connecticut, becomes the first person executed as a witch in the British American colonies.